public void MapTest()
{
Either <int, Exception> i = 404;
Either <int, Exception> e = new ArgumentException("Hi");
Either <double, Exception> out1 = i.MapLeft(x => x * 0.5);
Either <double, Exception> out2 = e.MapLeft(x => x * 0.5);
Assert.AreEqual(202.0, out1.Value);
Assert.AreEqual(e.Value, out2.Value);
Either <int, string> out3 = i.MapRight(x => x.Message);
Either <int, string> out4 = e.MapRight(x => x.Message);
Assert.AreEqual(404, out3.Value);
Assert.AreEqual("Hi", out4.Value);
}
